caa a22 4500 475826000 CHVBK 20180406123828.0 cr unu---uuuuu 170329e20000101xx s 000 0 eng 10.1007/s004450050006 doi (NATIONALLICENCE)springer-10.1007/s004450050006 Comment on " Volume of magma accumulation or withdrawal estimated from surface uplift or subsidence, with application to the 1960 collapse of Kīlauea volcano" by P. T. Delaney and D. F. McTigue [Elektronische Daten] [Daniel J. Johnson, Freysteinn Sigmundsson, Paul T. Delaney]  In volcanoes that store a significant quantity of magma within a subsurface summit reservoir, such as Kīlauea, bulk compression of stored magma is an important mode of deformation. Accumulation of magma is also accompanied by crustal deformation, usually manifested at the surface as uplift. These two modes of deformation - bulk compression of resident magma and deformation of the volcanic edifice - act in concert to accommodate the volume of newly added magma. During deflation, the processes reverse and reservoir magma undergoes bulk decompression, the chamber contracts, and the ground surface subsides. Because magma compression plays a role in creating subsurface volume to accommodate magma, magma budget estimates that are derived from surface uplift observations without consideration of magma compression will underestimate actual magma volume changes. Springer-Verlag Berlin Heidelberg, 2000 Key words Mogi nationallicence Dislocations nationallicence Deformation nationallicence Magma compressibility nationallicence Kīlauea nationallicence Gravity variations nationallicence Johnson Daniel J. Department of Geology, Central Washington University, Ellensburg, WA 98926, USA e-mail: dan@geology.cwu.edu Fax: +1-509-9632821, US aut Sigmundsson Freysteinn Nordic Volcanological Institute, Grensasvegur 50, IS-108, Reykjavik, Iceland, IS aut Delaney Paul T. U.S. Geological Survey, 2255 North Gemini Drive, Flagstaff, AZ 86001, USA, US aut https://doi.org/10.1007/s004450050006 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004450050006 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Johnson Daniel J. Department of Geology, Central Washington University, Ellensburg, WA 98926, USA e-mail: dan@geology.cwu.edu Fax: +1-509-9632821, US aut NATIONALLICENCE 700 1- Sigmundsson Freysteinn Nordic Volcanological Institute, Grensasvegur 50, IS-108, Reykjavik, Iceland, IS aut NATIONALLICENCE 700 1- Delaney Paul T. U.S. Geological Survey, 2255 North Gemini Drive, Flagstaff, AZ 86001, USA, US aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer